Drill.



PATENTED FEB. 26, 1907.

O. PARTINGTON.

DRILL;

- APPLICATION FILED JUNE 25, 1904.

8 SHEETSBHEET 1.

PA TENTED H1326, 1907.

G. PARTINGT ON-.

DRILL.

APPLIUATION FILED JUNE 25, 1904.

s SHEETS-SHEET z.

PATENTED FEB. 26, 1907.

C. PARTINGTON.

DRILL.

AfPLIOATION FILED Junizisj 1904.

q Vih wane;

PATENTEDQPEB. 26, 1907.

C. PARTINGTON.

DRILL.

APPLICATION FILED JUNE 25. 1904.

6 sums-S11E21? 4.

Wilfmzoaea No. 845,672. BATENTED FEB. 26, 1907' c. PARTINGTON DRILL.

APPLICATION FILED JUNE 25. 1904,

6 SHEEIS SHEBT 5.

PATE/NTED-PEB. 26, 1907;

G. PARTINGTON- DRILL. APPLICATION FILED JUNE 25. 1904.

31 vmftoz I/vita as touwig-D UNITnn Y srans arena CHARLES PARTINGTON, orCINCINNATI, .oIIIo, ASSIGNOR TO THE WEIR FROG COMPANY, or CINCINNATI,oIIIo, ACORPORATION.

BRILL.

Specification of Letters :Patent.

Eatented Feb. 26, 190?.

Application filed June 26, 1904. Serial No. 214.206.

To all whom it may concern:

Be it known thatI, CHARLES PARTINGTON,

a citizen of the United States, residing at plurality of drill-spindlesand to which the work is fed forward against the action of thedrilling-tools.

Another object of my invention is to provide an equalization of drive totwo staggered sets of drill-spindles in order to relieve thedriving-shafts of any undue strain, which would otherwise ailect thedrilling operation of some of the'drills. g Y

Another object oi my invention is to provide a series of work feedingcarriages simultaneously controlled in both forward. feed and in thereturn.

Another object of my invention is to provide work-supporting meanssecured to and carried by the various carriages adapted to adjust thework throughout its entire length to a common working plane.

Another object of my invention is toprovide automatic means fordisengaging the feeding-drive at various positions on the carria e-feediI nother object of my invention is the construction of the various partsof the drillframe in sections, adapting the same to be interchangeableas regards length and number of drills desired-that is, the length ofthe drill canbe extended by mere addition or duplication of parts to anydesired size.

he features ofmy invention are more fully set forth in the descriptionof the accompanying drawings, forming a part of the specifica Y Figure 1is a central vertical section of my improved drill, partly in elevation.Fig. 2 is a central vertical section of one of the carriages.tail-stock, and feeding mechanism. Fig. 3 is an end elevation, of acarriage-return hand-wheel, shaft, and brake. for locking the I samerigid during the forward feed. Fig. 4

is a similar section as that of Fig. 1 with the carriage mechanismomitted and illustrating the intermediate transmission means between themain powerdistributing shaft and carriage-driving shaft. Fig. 5 is adetail top plan view, partly in section, of a carriagedriving shaft withclutch mechanism and transmitting devices of the carriage-feed. Fig. 61s a section on hne 5. Fig. 7

is a section. on line 0 '22, Fig. 1, through three of the carriages inthe series. is a front elevation of the work supporting and adjustingmechanism, with the frame in section. Fig. 9 is a section on line w w,Fig. 1. Fig. 10 is an enlarged section of the clutch mechan ism mountedon the carriage powenshaih Fig. 11 is an end elevation of a portion ofthe drill, showing the position of drill -stocl s and their connectionsto the driving-shafts. Fig. 1.2 is an enlarged central section of thedrill-chuck support. Fig. 33 is eleva;;

tion, partly in section, of the wcrloclaniping nzecha'nism mounted totravel with the carriages.

Fig. 14 is a perspective vieruoi a supporting-plate for thedrill-ch11clr-supporting member for rigidly maintaining the drill in itsadjusted position. Fig. 15 is a section on line y 1 Fig. 1. Fig. 16 is aperspective view of one of the frame-sections and ways on which thehead-stocks of the drills are. F1 17 1s a ton Ian view or" one.

mounted. end of the drill, showing upon one side the carriage-section inposition. for use, upon the opposite side drill-spindles variouslyspaced with the drills removed.

1 represents the base-frame sections for supporting the various parts ofthe drill and of any suitable number desired to pro erly support a givenlength'of a drilling-inac line.

Zrepresents a motor suitahlymounted in the central portion of the drillbetween two of the supporting-frames. 1 3 represents the motor-shaft, towhich is fired a gear 4 5 represents several drill-stock bases respectively secured upon the supporting- .irames, and, if the drill is ofconsiderable length, these bases made up of sections secured together attheir abutting ends, each end resting upon the top face of thesupporting-i rames.

6 7 represent journal-boxes secured to the under face of the drill stockbase 5 ina plane with the motor-shaft 3.

8 represents the main driving-shaft, journaled in boxes 6 and 7. To oneend of shaft 8 is fixed a gear 9,'meshing-with the gear 4 of themotor-shaft 3. To the opposite end of said shaft 8 is fixeda bevel-gear10.

11,- Figs. 1-4, represents va shaft extending the entire-length of thedrill and journaled in bearings secured to the frames 1. Tothis shaft isfixed a bevel-gear 12, (see Fig. 4,) meshing with bevel-gear 10 fordriving the shaft '11, ,At eachend of the drill is mounted anintermediate shaft 13, (see Fig. 11, showing the same mounted at oneend,) duplicate arrangement being at the opposite (See Pigs. 1 and 4.)

end. These shafts drive theWork-shafts 16 and 1.7 at each endrespectively and relieve the shafts from the strain incident to a drivefrom one end only.

.14 represents a gear fixed to shaft 11 in mesh with a gear 15 fixed toshaft 13. These gears are wide-faced, so as to drive gears 18 and 19 onthe work-shafts. dles are arranged in two series, which are driven,respectively,by two separate work shafts.

16 and 17 represent these workshaftsgear 15 on shaft 13 and forming thetransmitspectively;

1 Upon the drill-base 5 are formed ways 20,

to which are gibbed the longitudinally-adjusting drill-head-stockmembers 21 21 In orderthat the drill-spindle may be adjusted'laterallyin their ways, I provide racks and gears.

(See Fig. 4.) 22 23 represent racks secured to the-base 5 and extendingthe entire length of the drill. 24 represents a shaft journaled in thehead-stock member 21,

to which are fixed rack-gears 25 and 26.

Thus by turning shaft 24 the drill headstocks may. be adjustedlongitudinally upon the base 5 and after which adjustment the head-stockis held secure in its adjusted position by the nut 27, screw-threaded onthe free end of shaft 24, lockin the gear 26 against its abutting end oft e head-stock member 21.

In order to adjust the drillvertically, I provide a rocking member. 28represents the drill-rocking member, pivoted to the head member 21 bymeansof the bolts 29 and studshaft 30. 31 represents a plate seatedbetween the arms of the drill-supporting mem her and head member. Thisplate is provided with bosses 32, extending from each side of thebolt-orifice, through which bolt 29 passes} adapted to fit in a notch 33in the arm 34 of' the drill-supporting member 28. The lower face of theplate 31 is square and abuts the head'member 21, preventing the samefrom having any revoluble action. Thus to The drill-spim' tmg means tothe series of drill-spindles re-- racket-arm rearwardly extending fromthe drill-head member '21 and forms a journalbearing for the stud-shaft36. 37 represents a downwardly-projecting journal-bracket from thebracket 35, (see Fig. 11,) in which bracket is journaled the bevelolublyfixed to the shaft 17, but adapted, by means of a feather, to belongitudinally ill-stock member upon the base 5.

slid therion by the longitudinal adjustment of the d a 39 represents abevel-gear fixed to thestudshaft 36 and meshed with the bevel-gear 38 ofone of the series of staggered gears and drills receiving motion fromshaft 17. 40 represents a bevel-gear fixed to the opposite end of thestud-shaft 36. 41. represents a bevel-gear fixed to a sleeve ofspur-gear 42, which 18 loosely journaled upon the stud-shaft 30, gear 41being in mesh with gear 40. Stud shaft or bolt forms the axis for therocking frame and allows bevel gear45 to travel on bev'el-gear 42 when"the rocking member 28 is moved do ad just-the drill-spindle vertically.43 represents the spindle or drill-shaft j onrnaled in a sleeve 44, saidsleeve bein screw-threaded into the drill member 28, t e function ofwhich will be hereinafter described. 45 represents a gear splined toshaft 43, said gear being provided with a sleeve 46, acting as ajournal-support. The parts 21 24 25 26 27 29 30 31 34 35 36 38 39 40 4142 43 45 (shown on Fig. 4) correspond to the parts marked with the samereference-figures shown in Fi 1. 47 represents a bushin in the drillreadmember 28, in which bus ing the sleeve46 of the spur-gear 45 is looselyjournaled, the said gear 45 being in mesh with gear 42, looselyjournaled on the stud-shaft 30. Thus the spindle drive iseffeeted fromshaft 17 throu h the train of gears and their respective s afts asfollows: gears 38 39, studshaft 36, gears 40, 41, 4 2, and 45. Thisarrangement is followed out through the entire series of the drill-headsoperated by shaft 17, but to relieve the strain incident to a shaft ofconsiderable length drii in a large number of drill-spindles thedrilleads are so arranged that one drill-spindle is driven by the shaft17 and its next adjacent or alternate or staggered series ofdrill-spindles is driven'by shaft 16, as shown in Fig.- 4, in which thebracket 35 has a greater rearward extension than the bracket 35 of thedrill-head member supporting the drill operated byshaft l7, and in whichnecessaril requires a provision of an extended journaf bracket 48, castintegral ear 38, revsenses I &

so the drill member 2n 3' supporting their respective drill-shafts 43;driven through a like train of gears and theirrespective shefts-to wit,goers 39, stud-shaft 36, gear 462' LFAZ, and 4.5 of the other staggeredseries of drills. v

The drill-stoeks having no letreladjnst- I meet, it; is necessary toprovi d e suitable means for s ehedgustment of drill-spindles to en-. ebe the same to be setup 1n .roper relation WEI-L 1. each other in order"so 1 a, uniform.

drilling throughout theseries end which is eeoomplished as follows: 4.4represents s 'me 'zher 28, the spindle-sheik {l3 being loosely 301..Within the bore: 44 represents sleeve 44 tothe shaft 43' against lateralmovement, so than: the'forwerd or rearward ,sdjusmem oi" the'sleeve willGerry. with it i the spindle-sheft 1 In order to prevent the sleeve 414from turning during the drilling opereiioms look isprovidedyt heconstrue tion of whieh is es follows, (see 12:) 51 represents s groovein the sleeve 44. 52

fregn'esmits a lever fulcnnned at 53 to the hearing or bracketfid, proecting from the drill-heed meinber.,28.' To one end of the lever 52 ispivoted. e look-pin 55, passing through a. slot in the drilldxesd 28 anden gaging inbo'lhegroove 51.. 56 represents a. spring for normallyholding vthe pin in engagement with the groove. Thus in order to makea.longitudinal.adjustment of drill the free end of tholever isdepressed, disengaging the pin froin the groove 51, permitting thesleeve 4A to be .turned, and, having serew-i hresded engagement with thedrill-heed member 28,. a forward or reverse (adjustment can be mede, esdesired. b

this eonstiuction of drill heaclit Will readily be seen that the drillscan be run at a high speed, the carriage fed forward gt a fastdrill-heed, as the parts ed when in their drilling feed withoutenyinndne strain upon .the e. ellrigidly mount is very essential sensdrilling "or snehniate'riel as steel.

'j i The feedin'g ol ihe wai kiimpbps ly slip- "Porting' the seineiv'ithrel ejtion-to the (hills is eocolnplished asjfollows, (seFigs land 2f) 57 represents isil sto ckjnioni'rted a nd secured upon one of"the frames 1, es neny sail-stocks being employed usually as 'thereeresupporting-f'remes for a given length of drill. 58 re resents a Wayprojeeging' from "theizeii-stoc ,npon which the earrings 61 forsupporting the carriage-feed shaft. 61

represents a carriage sliding upon the why 58 of the teilsstoc-k 57 andis provided with the npwsrdly-extended bearings 62 '63,

through which the screw 64 of the feed-shaft 65 passes.

For a. quick reverse I provide the following devices: 66 represents arevoluble nut hav ing an internal serew-thresded engagement with thescrew 64 of sheffi 65. This nut is provided with a. recess at enoh endinto which is fitted the bell-bearing rings 67 68, and Whi eh rings 11eve besring against the journalhrsokets 62 end 63 to provide a freemovement of'the nut. Likewise the feed-shaft 65 is provided with aflange 69 at the screw terminslforming en ehutmeno for the hellhesringring 70 stone end and. the journals bracket 59 of the tail-stool: 57 atthe opposite end. 'i'1 (see Fig. 5} represents eonnebtingplates securedbetween two of the carriages ofe series for holding the same in positionupon thewey of the tell-stock 57, the end carriages of a seriesbeing-gibhed to their respective Ways z The forward power-feed of thecarriages is as follows: Upon the main power-shaft 11,,-

- Fig. 4, isfixed e sproelret-gesr 72. 73 represents s shaft onrnaledupon breeketsor journal-boxes secured to the frames 1, preferably of alength equal to two frames, es shown in Fig. 5. Upon this shaft 73 isfixed e sprocket-gear 7 75 represents a driving transmitting power fromthe shsft 11 'to shaft 7 3) Upon shaft 73 is mounted a. clutch 76 forcontrolling the carriage-feed shaft. (See Figs. 5 end 10;) r The detailsof con sir-notion will. be more fully hereinafter described. 77represents a. gear fixed to the loose member of the elutch 76, in meshwith s gear 78, fixed to the transverse driving feed-shaft 79, saidshaftbei-ng journaled in the respective tail-stock 57, Fig. 5,throughout the series and extending the entire length thereof. 80,1 2,represents a Worm fixed to the feed-shefb'ZS and between the journalbrackets 59 600i iihe tail-stock 57. ,81 rep resents .s \vorn1 vvheelfixed' to the feed-shaft 65, mounted between the jourriel-behrings 59end GOa-nd meshing with the W0rrnf80, a.

like .oonstrnotion being carried on for each ICC ehein meshing With'geer72 and gear 74:, Y

tail-stool: in the series. In order toefiect the power-feed of thecarriage, it is necessary that the nut 66 he lochedngainst revolution. This is accomplished by thefollowing meh snisni, which forms 1.bWO-f0ldfu'netionof locking the nut 66 for theforward feed and which not whenreleased serves as a quick-reverse driving mechanism of the carriagewhen the forward feeder the feed-shaft 65-is at rest. The reverse of thecarriage is preferably shown as manually operated. 82, Figs. 2 and 7,represents a transverse shaft passing through the carriages of theseries below the nut 66. 83 represents bevel-gears fixed to the shaft82, Fig. 7, in mesh with bevel-gears 84, loose on a stud-shaft 85,mounted on the carriage, as shown in Fig. 2. Fixed to said bevel-gear 84is a spur-gear 86, in mesh with teeth 87, formed on the outer peripheryof the nut 66. In light work this form of gear arrangement may besufficient torlock the nut'inthe forward feed, but to insure-the sameagainst revolution further precaution is taken to eflect a positivelock. Upon one end of the reverse shaft 82 is fixed a hand-wheel 88,Fig. 3. 89 represents a bracket mounted upon the end carriage of aseries and projecting outward over the hind- Wheel 88. 90 represents asteel strap fitting over the periphery of the hand-wheel 88, one end ofsaid strap being secured to the bracket 89, the other end being securedto rod 91, having bearing in said bracket 89. The free end of said rod91 is screw threaded. The rod 91 is adapted to be loosely supportedwithin the bore of the bracket 89, through which it projects. 92represents a handwheel having screw-threaded engagement with the rod 91.Thus a forward revolution of the hand-wheel 91 upon the rod 92 willbring the same into abutting engagement with the bracket 89, drawingwith it the .rod

91, tightening the strap 90 around the periphery of the hand-wheel 88,and thereby positively locking the same from revolution during theforward feed of the carriage. As shown, the forward feed, or, rather,the working feed, is obtained by power. The reverse or adjusting forwardfeed of the carriage can be obtained manually and is accomplished byreleasing the strap 90 from locking engagement with the hand-wheel 88,revolving the hand-wheel in the direction desired for the manipulationof the carriage, which will in turn revolve the shaft 82, gear Wheel 83transmitting motion to bevel-gear 84, spur-gear 86, loosely mounted onshaft 85,

revolving the nut'66 backward and forward upon the screw 64 of theSCI'GW-Shjtfl) 65. This feed can be accomplished regardless of themotion of the screw-shaft 65; but of course it is preferable to shut offthe power to'the SC'I'GWSl1;-fl7 65, having the same idle during thehand-feed operation, in which instance the nut 66 travels on screw 64,that drives the carriages. V I

The supporting and presenting of the work to be drilled to the action ofthe drills is ac- 58 of the tail-stock 57. These brackets are centraprovided with downwardly-projecting arms 94 upon each side of the ways58 and frames pivoted the work-supporting links 95 96, v

swinging upwardly on axis at the foot of arms 94. 97 represents rollersjournaled to the upper end of links 95 96, upon which the work rests.(See Fig. 1.) Between the links 95 96.is pivoted a nut 98, the nuts onthe ri ht-hand side being provided with a T bore having a right-handscrewthread and the nuts on the left being provided with a bore having aleft-hand screw-thread. To simultaneously adjust the height of all therolls 97, I provide the following: 99 represents a shaft extending theentire length of the drill and passing between the links 95 and 96, oneend of said shaftbeing provided, or both, if desirable; with a squarehead to which a hand wheel or crank may be inserted for operating theshaft 99. -100 represents worms fixed to the shaft 99, the threads ofright and left hand screws, according to the nut with which therespective worms engage. Thus it will be seen that by a manipulation ineither direction of the shaft 99 the links, with their respective nuts,will be moved or swung to and from the center of the carriage, therebyraising and lowering the position of roller-level upon which the work issupported, thereby properly adjusting the same.

g In order to automatically throw on and off the power of the feed-shaft79, the following mechanism is provided: 76 is a clutch, as statedbefore, on shaft 73, consisting of two disk members, one fast and theother loose on said shaft, said clutch being provided. with a slidingmember 101, having splined engagement with the shaft 73. 102 representsthe disk or member fixed to the shaft 73 within the loose clutch member103, (see Fig. 10,) the hub of which is loosely journaled on shaft 73. I104 represents turnbuckles one end of which is pivoted to a slidingmember 101 on shaft 73, the opposite end to a link 105, said link beingin turn pivoted to the disk 102. 106 repiesents'segmental-frictionplateswithin the member 103, having secured thereto and extending toward theshaft 73 pins 107. These pins are provided with a slot through which thelinks pass. As many of these links and turnbuckles may be employed asdesired, but four being sufficient. 108 represents segment-shoes securedto the plates 106'. Thus it will be seen that a movement to the left ofthe sliding member 101 will change the angle of links 105, therebypulling inward the pins 107, releasing the clutching engagement of thedriving member of the clutch'from the loose Fig. 5.)

have preferably shown a clamp controlled by projection therefrom.

.tion 114, between w eaasva a 112 represent collars ixed to the shaft 73for limiting the moveme of member 101 at one end and the clutch r- -nber103 at the other. 113 represents a lev aving the looped porch and towhich the secured, one end of yokes 110 are pivo said lever 113 beingcured to the frames 1. The opposite end of said lever is pivoted to abar 116, said bar passing the entire length of the drill and seated inrecesses in the tail-stocks 57 and held in position by the cap-plates117. (See This bar 116' is provided with a number of handles 118,whereby the bar may be easily controlled by hand for operating theclutch 76 at convenient points along the drill. 119 represents a linkhaving an elongated slot 120 at one end thereof, the opposite end beingpivoted to a bell-crank lever 121, pivoted to the frame and to the bar116. 122 represents a nut screw-threaded into one of the plates 71. Thusit will be readily seen that when the carriage has either traveledforward or backward to bring the nut 122 at either end of the slot afurther feed will opcrate link 119, clutch-rod 116, and clutch 76,throwing off or on the power. The length of slot 120 limits thecarriage-feed. In order to suitably hold the work to the carriage, I

hydraulic pressure, (see Fig. 13;) but it isobvious that any well-knownclamp may be substituted. j

The clamp, as shown, is mounted and constructed as follows: 123represents a bracket having gibbed engagement with the flange of theplate 71 at one end and to the shart 82 at the lower end. 1524represents an arm pivoted to the bracket 123, adapted to be swungupwardly when the clamp 18 released. To the free end of the arm 124 ismounted piston-cylinder 125, having a downward 126 representsa pistonwithin the cylinder 125, having the boss 128 represents a port lead.ngto the piston-chamber and connecting with suitable piping for conveyingcompressed air to the piston-chamber. Thus the compressed air is turnedon, the piston 126 can be driven forward to bring its boss 127 intoengagement with the work. 129 represents a col-spring to bring thepiston into its normal position when the compressed air is shut off. Anynumber of these'clamps may be mounted 'oted to a bar 115, se-'throughout the drill as desired and which may be simultaneously orindividually controlled.

It will thus be seen that I have provided a multiple drill made up ofsection-frames for adjustably supporting the individual drillstoeksseated on ways, on which frame are also supported on one side of theframework carriages travehng on ways, mechanism for feeding thecarriages simultaneously forward to the drills, so that any desirednumber of holes may be bored at the same time and the work uniformly fedto the multiple drills. It

will also be seen that each drill-s )Lndle is journaled in its ownhead-stock, an that all the head-stocks may be adjusted laterally, andthat each drill. is adjusted vertically by rocking on its driving-gearas an axis, thus allowing the holes bored in the work to be staggeredhorizontally.

As the drill-spindles simply rotate in work ing and do not travel towardthe work, and as there is a multiple number of drills used,

it is necessary that the point of the different drills may be adjustedpractically to the same vertical plane. For this reason eachdrill-spindle has a longitudinal adjustment of its own and means forlookin it to its adjusted position, so that varying lengths of dril maybe employedfor the different spindles and yet may be separately adjustedto the same working line.

It will be observed that the different drillstocks each being separatelysupported on ways, they may be adjusted to and from each other atliberty, so as to regulate the distance apart of the holes to be bored.

It will be observed that the several driving mechanisms of the series ofdrills are arranged in two series, each lternate drill being driven by aseparate s aft from the next adjacent drill, thereby dividing thestrain-by employ-in a parallel pair of driving shafts, and which a lowsa closer adjustment of the several drills to each other than could beobtained if their respective driving-gears were sideby side instead ofstaggered in two rows. The several parts of the machine, driving-gears,&c., belngduplicates of each other and the frame being made in sectionsmaterially cheapens the cost of construction and transportation,combining at the same time economy, strength, and s mplicity.

Having described my invention, I claim' 1. A multiple drill composed ofa frame, ways formed along one side of the frame, a series of drillhead-stocks seated on said ways, drill-spindles journaled in saidheadtoo stocks, transverse ways fixed to and on the opposite side ofsaid frame, a work-carriage mounted on said transverse ways, independentadjustable work-supports mounted on said carriage, means forcooperatively adjusting said work-su ports, mechanism for revolving thedril -spindles simultaneously,

and feeding mechanism for reciprocating said carriage to and from thedrill-spindles, substantially as described.

2. A multiple drill composed of a frame, having longitudinal ways uponone side, laterally-adjustable head-stocks mounted on said ways,drill-spindle su ports journaled on said stocks, means for {M justingsaid supports independent of the stocks, independent transmittingmechanism for each spindle, transverse ways upon the opposite side ofthe frame, work-supporting carriages mounted upon said ways, andmechanism for feeding the work-carriages to and from the drillspindlesimultaneously,substantially as described.

3. A multiple drill composed of a series of Sectional frames attachedside by side lengthwise of the drill, each section having a series oflongitudinal ways on one side thereof, a

series of head-stocks mounted and longitudi-' nally adjustable thereon,a drill-spindle individually journaled in each head-stock, a transverseway on each frame-section oppo site the drill-spindle, a work-supportingcar riage seated on said ways, power-transmitting mechanism forsimultaneously rotating the series of drills and power mechanism forfeeding the work-supporting carriage to the drills, substantially asdescribed.

4. In a multiple drill, a frame having oppositely-disposed longitudinaland transverse ways, one or more work-supporting carriages supported onsaid transverse ways, the combination therewith of a series ofheadstocks mounted on said longitudinal ways opposite the saidcarriages, a main drivingshaft, intermediate driving-shafts, a pair ofparallel driving-sh: fts receiving motion throu h a traiu of gears fromthe main shaft, a dril -spindle sup ort mounted on each head-stock.means or adjusting said drillspindle su )orts independent of theirrespec t1ve headstocks, a drill-spindle journaled in each support, atrain of gears for each drill s indle connecting each alternatedrillsspine with one of said parallel shafts, a train of gearsconnecting each alternate drill-spindle to the o posite parallel shaft,substantially its-described. I

5. In a multiple drill, a frame having oppositely-disposed longitudinaland transverse Ways, one or more Work-supporting carriages mounted onsaid transverse Ways, a series of head-stocks mounted on saidlongitudinal ways opposite said carriages, means for adjustin eachhead-stock laterally, mechanism for locking the head-stocks in theiradjusted positions, main drivingshaft, parallel transmitting-shafts, atrain of gears connecting said main driving-shaftand paralleltransmitting-shafts a drill-spindle support. pivotally mounted'on eachhead-- stock whereby the drill-spindle supports.

may be independently adjustedupon their side of said frame,drill-spindle supports pivotally mounted upon each head-stock forvertical adjustment, means for locking the drill-spindle supportsindependently in their adjusted positions, and a drill-spindle journaledin each support, substant ally as described.

7. In a multiple drill composed 01 a frame, transverse ways on one sidethereof, a worksupporting carriage slidably mounted on said ways,longitudinal ways on the opposite side of the frame, a series .ofhead-stocks mounted on said ways, a drill-spindle support adjustablymounted upon each head-stock, mechanism for locking said drill-spindlesupports respectively in a fixed position, a drillspindle journaled ineach support, a train of gears journaled upon said head-stocks anddrill-spindle supports permitting of adjustment of the drill-spindlesupports, and means for transmitting motion to said train of gears anddrill spindles, substantially as described. a

8. In a multiple drill provided with longitudinal ways a series ofhead-stocks mounted on longitudinal 'ways, a drill-spindle journaled oneach head-stock, a sleeve for respectively journaling each drill-spindleand provided with an external screw-thread, a supporting-sleeveinteriorly screw threaded en- A I gaging and supporting thejournal-sleeve, means for locking the journal-sleeve against rotationwhereby-each individual drill-s 'ndle maybe adjustedlongitudinally and100 ed against longitudinal movement when in rotation, means forsimultaneously driving the drill-spindles and means for feeding the Workforward to the series of drill-spindles,

substantially as described. r

9. In a mu ple drill, Ways for supporting the carriages, a plurality ofwork-supporting carriages, each mounted upon a way, mechanism forfeeding said carriagesto' the drill, the combination with each carriageof a pair of outwardly-inclined arms pivoted th eto,

a work-supporting roller mounted o'n the top of each arm, anadjusting-shaft common to each pair of the carriage-arms and adjustingmechamsm connected to each pair of arms wherebysaid pairs of arms aresimultaneously moved to and from each other for adjusting the height ofthe work-supporting rollers,

substantially as described.

saas'ze 1 0. In a multiple diill'employing a series of Work-supportingcarriages mountedu on Ways in the plane opposite tlie drill-spindles,Work-supporting arms adjustably mounted upon the carriages, means foradjusting the arms vertically, a back support for the work mounted oneach carriage and pivoted overhanging arm on each carriage, a frontclamp secured to said arm and supported in front 'of the work, andmechanism for moving the clamp in contact with the workpiece and forcingit against the back support, substantially as described.

11. In a multiple drill, a carriage, a plurality of Work-supportsmounted on said carriage, consisting of inclined link-arms upon the freeends of which the Work rests, and.

means for adjusting the angular inclination of said arms simultaneously,substantially as described. 7

I 12. In a multiple'drill, a carriage, a plurality of work-supportsmounted on said carriage, consisting of alternately-inclinedWorksupporting arms, and means for adjusting the angular inclination ofsaid arms simultaneously, substantially as described 13. In a multipledrill, a series of carriages, means for feeding said carriages inunison, a plurality of Work-supports mounted on said carriages, andmeans for simultaneously adjusting said work-supports at right angles tothe plane of carriage travel, substantially as described.

In testimony whereof I have hereunto set my hand.

CHARLES PARTINGTON Witnesses:

OLIVER B. KAIsER, Lmsn BECK.

